Solution

/*

Programmer: Jennifer Leopold

Date: February 23, 2016

File: hw5.cpp

Purpose: Simulate a pharmacy where the user chooses an item

from a menu, and the program outputs the item

ingredients.

To compile: g++ hw5.cpp -o hw5

To execute: ./hw5

*/

#include <iostream>

#include <ctime>

using namespace std;

//***** Constant declarations *****

// Ingredients for the various items

const string INGREDIENT_1 = "sugar";

const string INGREDIENT_2 = "Karo syrup";

const string INGREDIENT_3 = "baking soda";

const string INGREDIENT_4 = "rotgut vodka";

const string INGREDIENT_5 = "ground acorn hulls";

const string INGREDIENT_6 = "rendered possum fat";

const string INGREDIENT_7 = "used motor oil";

// Amounts for the various ingredients for each item

const short ASPIRIN_AMT_INGREDIENT_1 = 15;

const short ASPIRIN_AMT_INGREDIENT_3 = 2;

const short ASPIRIN_AMT_INGREDIENT_5 = 6;

const short SNAKEOIL_AMT_INGREDIENT_2 = 2;

const short SNAKEOIL_AMT_INGREDIENT_4 = 2;

const short SNAKEOIL_AMT_INGREDIENT_7 = 5;

const short MOUTHWASH_AMT_INGREDIENT_2 = 1;

const short MOUTHWASH_AMT_INGREDIENT_4 = 2;

const short MOUTHWASH_AMT_INGREDIENT_7 = 5;

// Min and max age (for validating user input)

const short MIN_AGE = 0;

const short MAX_AGE = 120;

// Min and max # toes (for validating user input)

const short MIN_TOES = 0;

const short MAX_TOES = 10;

// Cutt-off age for determining ingredient inclusion in

// mouthwash

const short MOUTHWASH_CUTOFF_AGE = 12;

// Factors for determining amount of possum fat

const short TOOTHPASTE_POSSUM_FAT = 4;

const short SNAKEOIL_POSSUM_FAT = 6;

// Message that's output preceding each item ingredient list

const string PRESCRIPTION_MSG = "\nOK, we need to mix up:\n";

//***** Function prototypes *****

void outputGreeting();

void aspirin();

void snakeOil();

void mouthwash();

void toothpaste();

int getIntInput(const string prompt, const int lowerBound,

const int upperBound);

int calculatePossumFatAmount(const int personalAttribute,

const int prescriptionFactor);

void outputSignOff();

//***** Main program starts here *****

int main()

{

bool quit = false; // true when user wants to quit

short option; // menu option

// Display a greeting

outputGreeting();

// Display menu and get user input until s/he wants to quit

do

{

cout << "\nPrescription Recipes:\n";

cout << "1. Aspirin\n";

cout << "2. Snake oil\n";

cout << "3. Mouthwash\n";

cout << "4. Toothpaste\n";

cout << "5. Quit\n";

cout << "What do you want (1-5): ";

cin >> option;

switch (option)

{

case 1 : aspirin();

break;

case 2 : snakeOil();

break;

case 3 : mouthwash();

break;

case 4 : toothpaste();

break;

case 5 : quit = true;

break;

default : cout << "C'mon, y'all gots to pick one of"

<< " the above options!\n";

}

} while (! quit);

// Display a sign-off message

outputSignOff();

return 0;

}

//***** Function definitions *****

/*

Output greeting message (i.e., when user first starts

program).

*/

void outputGreeting()

{

cout << "\nWelcome to Cletus' Farmassy!\n";

return;

}

/*

Output ingredients for aspirin.

*/

void aspirin()

{

cout << PRESCRIPTION_MSG;

cout << ASPIRIN_AMT_INGREDIENT_1 << " grams "

<< INGREDIENT_1 << endl

<< ASPIRIN_AMT_INGREDIENT_3 << " grams "

<< INGREDIENT_3 << endl

<< ASPIRIN_AMT_INGREDIENT_5 << " grams "

<< INGREDIENT_5 << endl;

return;

}

/*

Output ingredients for aspirin based on input for # toes.

*/

void snakeOil()

{

int toes = getIntInput("number of toes", MIN_TOES, MAX_TOES);

cout << PRESCRIPTION_MSG;

cout << SNAKEOIL_AMT_INGREDIENT_2 << " tbls "

<< INGREDIENT_2 << endl

<< calculatePossumFatAmount(toes, SNAKEOIL_POSSUM_FAT)

<< " tbls " << INGREDIENT_6 << endl

<< SNAKEOIL_AMT_INGREDIENT_7 << " tbls "

<< INGREDIENT_7 << endl

<< SNAKEOIL_AMT_INGREDIENT_4 << " liters "

<< INGREDIENT_4 << endl;

return;

}

/*

Output ingredients for mouthwash based on input for age.

*/

void mouthwash()

{

int age = getIntInput("age", MIN_AGE, MAX_AGE);

cout << PRESCRIPTION_MSG;

if (age < MOUTHWASH_CUTOFF_AGE)

cout << MOUTHWASH_AMT_INGREDIENT_2 << " liter "

<< INGREDIENT_2 << endl;

else cout << MOUTHWASH_AMT_INGREDIENT_4 << " liters "

<< INGREDIENT_4 << endl;

cout << MOUTHWASH_AMT_INGREDIENT_7 << " tbls "

<< INGREDIENT_7 << endl;

return;

}

/*

Output ingredients for toothpaste based on input for age.

*/

void toothpaste()

{

int age = getIntInput("age", MIN_AGE, MAX_AGE);

aspirin();

cout << calculatePossumFatAmount(age, TOOTHPASTE_POSSUM_FAT)

<< " tbls " << INGREDIENT_6 << endl;

return;

}

/*

Output specified prompt, and get input for an integer in

specified range lowerBound..upperBound (inclusive). Entered

integer is returned.

*/

int getIntInput(const string prompt, const int lowerBound,

const int upperBound)

{

int x;

bool invalidEntry;

do

{

cout << "\nPlease enter your " << prompt << ": ";

cin >> x;

invalidEntry = (x < lowerBound) || (x > upperBound);

if (invalidEntry)

cout << "Now, dagnabbit, that just can't be!\n";

} while (invalidEntry);

return(x);

}

/*

Calculate amount of possum fat to use as product of

specified personalAttribute (e.g., age) and a pre-

scription factor. Calculated value is returned.

*/

int calculatePossumFatAmount(const int personalAttribute,

const int prescriptionFactor)

{

return(personalAttribute * prescriptionFactor);

}

/*

Output sign-off message (i.e., when user quits program).

*/

void outputSignOff()

{

cout << "\nY'all have a real nice day!\n";

return;

}